The **MAH74TCX-R** is a high-performance, shielded power inductor manufactured by **Coilcraft**. It is specifically designed for high-temperature automotive applications and power electronics requiring compact footprints and robust electromagnetic interference (EMI) suppression. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | |:---|:---| | **Inductance** | 0.74 µH (at 100 kHz) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | High current capacity (typically ~15-20A range depending on temp rise) | | **Saturation Current (Isat)** | High saturation (maintains inductance at peak loads) | | **DC Resistance (DCR)** | Extremely low (mOhms) to minimize power loss | | **Operating Temperature** | -40°C to +150°C (AEC-Q200 Grade 0) | | **Shielding** | Magnetically shielded for low EMI | --- ### 2. Core Features and Benefits * **AEC-Q200 Qualified:** This part is automotive grade, meaning it has passed rigorous stress tests for vibration, thermal shock, and moisture resistance. * **Composite Construction:** It uses a specialized metal-moly powder core. This construction allows for "soft saturation," preventing a sudden drop in inductance when current spikes occur. * **Shielded Design:** The magnetic shielding minimizes the leakage of magnetic flux, which is critical for dense PCB layouts to prevent interference with nearby sensitive components. * **Low Profile:** The "MAH" series is designed to maximize power density while keeping a low physical height. --- ### 3. Common Applications The MAH74TCX-R is typically found in the following electronic circuits: 1. **Automotive ECU Power Supplies:** Used in Engine Control Units or ADAS modules where heat levels are high. 2. **DC-DC Converters:** Acts as an energy storage element in buck or boost regulators. 3. **LED Drivers:** Provides stable current regulation for automotive lighting systems. 4. **High-Current VRMs:** Voltage Regulator Modules in industrial computing or communication hardware. --- ### 4. Part Number Breakdown | Segment | Meaning | |:---|:---| | **MAH** | Series identifier (High-temp, shielded composite) | | **74** | Inductance code (0.74 µH) | | **TC** | Size/Material variation code | | **X** | Tolerance code (usually ±20%) | | **R** | Packaging (Tape and Reel) |